Stock-to-Flow Ratio measures the scarcity of a crypto asset by dividing the total circulating supply (stock) by the annual rate of new coins being issued (flow), quantifying how many years of current production would be required to replicate the existing supply. The higher the ratio, the scarcer the asset relative to its rate of new supply introduction.
For assets with fixed or declining issuance schedules, Stock-to-Flow increases predictably over time - particularly following halving events that reduce the flow component while stock continues to grow. This mechanical increase in scarcity has historically been associated with significant price appreciation in the periods following supply reductions, forming the basis of the Stock-to-Flow valuation model which posits that scarcity is a primary driver of long-run price.
Tracked alongside new supply, Puell Multiple, and miner reserve data, Stock-to-Flow provides a supply-scarcity framework for long-run valuation - most useful as a macro cycle reference point rather than a short-term timing tool, as the ratio changes slowly and predictably while price volatility can cause significant short-term deviations from model-implied values.
